/*
 * cocos2d for iPhone: http://www.cocos2d-iphone.org
 *
 * Copyright (c) 2008-2010 Ricardo Quesada
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


#import <math.h>
#import "ccConfig.h"

#import <Foundation/Foundation.h>
#import <Availability.h>

/**
 @file
 cocos2d helper macros
 */

/*
 * if COCOS2D_DEBUG is not defined, or if it is 0 then
 *	all CCLOGXXX macros will be disabled
 *
 * if COCOS2D_DEBUG==1 then:
 *		CCLOG() will be enabled
 *		CCLOGERROR() will be enabled
 *		CCLOGINFO()	will be disabled
 *
 * if COCOS2D_DEBUG==2 or higher then:
 *		CCLOG() will be enabled
 *		CCLOGERROR() will be enabled
 *		CCLOGINFO()	will be enabled 
 */
#if !defined(COCOS2D_DEBUG) || COCOS2D_DEBUG == 0
#define CCLOG(...) do {} while (0)
#define CCLOGINFO(...) do {} while (0)
#define CCLOGERROR(...) do {} while (0)

#elif COCOS2D_DEBUG == 1
#define CCLOG(...) NSLog(__VA_ARGS__)
#define CCLOGERROR(...) NSLog(__VA_ARGS__)
#define CCLOGINFO(...) do {} while (0)

#elif COCOS2D_DEBUG > 1
#define CCLOG(...) NSLog(__VA_ARGS__)
#define CCLOGERROR(...) NSLog(__VA_ARGS__)
#define CCLOGINFO(...) NSLog(__VA_ARGS__)
#endif // COCOS2D_DEBUG

/** @def CC_SWAP
simple macro that swaps 2 variables
*/
#define CC_SWAP( x, y )			\
({ __typeof__(x) temp  = (x);		\
		x = y; y = temp;		\
})


/** @def CCRANDOM_MINUS1_1
 returns a random float between -1 and 1
 */
#define CCRANDOM_MINUS1_1() ((random() / (float)0x3fffffff )-1.0f)

/** @def CCRANDOM_0_1
 returns a random float between 0 and 1
 */
#define CCRANDOM_0_1() ((random() / (float)0x7fffffff ))

/** @def CC_DEGREES_TO_RADIANS
 converts degrees to radians
 */
#define CC_DEGREES_TO_RADIANS(__ANGLE__) ((__ANGLE__) * 0.01745329252f) // PI / 180

/** @def CC_RADIANS_TO_DEGREES
 converts radians to degrees
 */
#define CC_RADIANS_TO_DEGREES(__ANGLE__) ((__ANGLE__) * 57.29577951f) // PI * 180

/** @def CC_BLEND_SRC
default gl blend src function. Compatible with premultiplied alpha images.
*/
#if CC_OPTIMIZE_BLEND_FUNC_FOR_PREMULTIPLIED_ALPHA
#define CC_BLEND_SRC GL_ONE
#define CC_BLEND_DST GL_ONE_MINUS_SRC_ALPHA
#else
#define CC_BLEND_SRC GL_SRC_ALPHA
#define CC_BLEND_DST GL_ONE_MINUS_SRC_ALPHA
#endif // ! CC_OPTIMIZE_BLEND_FUNC_FOR_PREMULTIPLIED_ALPHA

/** @def CC_ENABLE_DEFAULT_GL_STATES
 GL states that are enabled:
	- GL_TEXTURE_2D
	- GL_VERTEX_ARRAY
	- GL_TEXTURE_COORD_ARRAY
	- GL_COLOR_ARRAY
 */
#define CC_ENABLE_DEFAULT_GL_STATES() {				\
	glEnableClientState(GL_VERTEX_ARRAY);			\
	glEnableClientState(GL_COLOR_ARRAY);			\
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);	\
	glEnable(GL_TEXTURE_2D);						\
}

/** @def CC_DISABLE_DEFAULT_GL_STATES 
 Disable default GL states:
	- GL_TEXTURE_2D
	- GL_VERTEX_ARRAY
	- GL_TEXTURE_COORD_ARRAY
	- GL_COLOR_ARRAY
 */
#define CC_DISABLE_DEFAULT_GL_STATES() {			\
	glDisable(GL_TEXTURE_2D);						\
	glDisableClientState(GL_COLOR_ARRAY);			\
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);	\
	glDisableClientState(GL_VERTEX_ARRAY);			\
}

/** @def CC_DIRECTOR_INIT
	- Initializes an EAGLView with 0-bit depth format, and RGB565 render buffer.
	- The EAGLView view will have multiple touches disabled.
	- It will create a UIWindow and it will assign it the 'window' variable. 'window' must be declared before calling this marcro.
	- It will parent the EAGLView to the created window
	- If the firmware >= 3.1 it will create a Display Link Director. Else it will create an NSTimer director.
	- It will try to run at 60 FPS.
	- The FPS won't be displayed.
	- The orientation will be portrait.
	- It will connect the director with the EAGLView.

 IMPORTANT: If you want to use another type of render buffer (eg: RGBA8)
 or if you want to use a 16-bit or 24-bit depth buffer, you should NOT
 use this macro. Instead, you should create the EAGLView manually.
 
 @since v0.99.4
 */

#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED

#define CC_DIRECTOR_INIT()																		\
do	{																							\
	window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];					\
	if( ! [CCDirector setDirectorType:kCCDirectorTypeDisplayLink] )								\
		[CCDirector setDirectorType:kCCDirectorTypeNSTimer];									\
	CCDirector *__director = [CCDirector sharedDirector];										\
	[__director setDeviceOrientation:kCCDeviceOrientationPortrait];								\
	[__director setDisplayFPS:NO];																\
	[__director setAnimationInterval:1.0/60];													\
	EAGLView *__glView = [EAGLView viewWithFrame:[window bounds]								\
									pixelFormat:kEAGLColorFormatRGB565							\
									depthFormat:0 /* GL_DEPTH_COMPONENT24_OES */				\
							 preserveBackbuffer:NO												\
									 sharegroup:nil												\
								  multiSampling:NO												\
								numberOfSamples:0												\
													];											\
	[__director setOpenGLView:__glView];														\
	[window addSubview:__glView];																\
	[window makeKeyAndVisible];																	\
} while(0)


#elif __MAC_OS_X_VERSION_MAX_ALLOWED

#import "Platforms/Mac/MacWindow.h"

#define CC_DIRECTOR_INIT(__WINSIZE__)															\
do	{																							\
	NSRect frameRect = NSMakeRect(0, 0, (__WINSIZE__).width, (__WINSIZE__).height);				\
	self.window = [[MacWindow alloc] initWithFrame:frameRect fullscreen:NO];					\
	self.glView = [[MacGLView alloc] initWithFrame:frameRect shareContext:nil];					\
	[self.window setContentView:self.glView];													\
	CCDirector *__director = [CCDirector sharedDirector];										\
	[__director setDisplayFPS:NO];																\
	[__director setOpenGLView:self.glView];														\
	[(CCDirectorMac*)__director setOriginalWinSize:__WINSIZE__];								\
	[self.window makeMainWindow];																\
	[self.window makeKeyAndOrderFront:self];													\
} while(0)

#endif

 
 /** @def CC_DIRECTOR_END
  Stops and removes the director from memory.
  Removes the EAGLView from its parent
  
  @since v0.99.4
  */
#define CC_DIRECTOR_END()										\
do {															\
	CCDirector *__director = [CCDirector sharedDirector];		\
	CC_GLVIEW *__view = [__director openGLView];				\
	[__view removeFromSuperview];								\
	[__director end];											\
} while(0)


#if CC_IS_RETINA_DISPLAY_SUPPORTED

/****************************/
/** RETINA DISPLAY ENABLED **/
/****************************/

/** @def CC_CONTENT_SCALE_FACTOR
 On Mac it returns 1;
 On iPhone it returns 2 if RetinaDisplay is On. Otherwise it returns 1
 */
#import "Platforms/iOS/CCDirectorIOS.h"
#define CC_CONTENT_SCALE_FACTOR() __ccContentScaleFactor


/** @def CC_RECT_PIXELS_TO_POINTS
 Converts a rect in pixels to points
 */
#define CC_RECT_PIXELS_TO_POINTS(__pixels__)																		\
	CGRectMake( (__pixels__).origin.x / CC_CONTENT_SCALE_FACTOR(), (__pixels__).origin.y / CC_CONTENT_SCALE_FACTOR(),	\
			(__pixels__).size.width / CC_CONTENT_SCALE_FACTOR(), (__pixels__).size.height / CC_CONTENT_SCALE_FACTOR() )

/** @def CC_RECT_POINTS_TO_PIXELS
 Converts a rect in points to pixels
 */
#define CC_RECT_POINTS_TO_PIXELS(__points__)																		\
	CGRectMake( (__points__).origin.x * CC_CONTENT_SCALE_FACTOR(), (__points__).origin.y * CC_CONTENT_SCALE_FACTOR(),	\
			(__points__).size.width * CC_CONTENT_SCALE_FACTOR(), (__points__).size.height * CC_CONTENT_SCALE_FACTOR() )

#else // retina disabled

/*****************************/
/** RETINA DISPLAY DISABLED **/
/*****************************/

#define CC_CONTENT_SCALE_FACTOR() 1
#define CC_RECT_PIXELS_TO_POINTS(__pixels__) __pixels__
#define CC_RECT_POINTS_TO_PIXELS(__points__) __points__

#endif // CC_IS_RETINA_DISPLAY_SUPPORTED
